Mustafa Iman created HIVE-23529:

             Summary: CTAS is broken for uniontype when row_deserialize
                 Key: HIVE-23529
             Project: Hive
          Issue Type: Bug
            Reporter: Mustafa Iman
            Assignee: Mustafa Iman

CTAS queries fail when there is a uniontype in source table and 

ObjectInspectorUtils.copyToStandardObject in ROW_DESERIALIZE path extracts the 
value from union type. However, VectorAssignRow expects a StandardUnion object 
causing ClassCastException for any CTAS query.

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